#!/usr/bin/env python3.11
from typing import List

from data import Node, parse
    

def count_steps_AAA_ZZZ(directions:str , node_list: List[Node]) -> int:
    count = 0
    current_node = list(filter(lambda n:n.value == 'AAA', node_list))[0]
    while current_node.value != 'ZZZ':
        current_node = current_node.move_left(node_list) if directions[count % len(directions)] == 'L' else current_node.move_right(node_list)
        count += 1
    return count
            
if __name__ == '__main__':
    directions, node_list = parse('input.txt')
    count = count_steps_AAA_ZZZ(directions, node_list)
    print(count)